Figure 10. Comparison of Na⁺-dependent re-alkalinization in normal and NH₄⁺-treated animals under Cl⁻-free conditions.

The protocol was as described in Fig. 4. Left panel: NH₄⁺-treated animals. Right panel: untreated animals. The dashed lines indicate the initial rate of re-alkalinization. Also after removal of bilateral Cl⁻ in NH₄⁺-treated animals a significantly faster rate of re-alkalinization is obvious. In addition a significantly higher steady state pH_i after Na⁺-dependent HCO₃⁻ influx is reached in NH₄⁺-treated animals.